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The "crew-cut" aggregates of polystyrene-b-poly(ethylene oxide)-b-polystyrene triblock copolymers in aqueous media
Yuan, JJ; Li, YS; Li, XQ; Cheng, SY; Jiang, L; Feng, LX; Fan, ZQ
2003-04-01
Source PublicationEUROPEAN POLYMER JOURNAL
ISSN0014-3057
Volume39Issue:4Pages:767-776
AbstractIn this paper, the "crew-cut" aggregates in aqueous media formed by polystyrene (PS)-b-poly(ethylene oxide) (PEO)-b-PS triblock copolymers were presented. The polymers used are PS43-b-PEO45-b-PS43, and PS40-b-PEO136-b-PS40 triblock copolymers (the subscripts are the degree of polymerization). The several factors affecting the aggregation behaviors have been investigated. The multiple morphologies, including vesicles, large compound vesicles, large compound micelles (LCMs), and so on, were obtained by altering the solvents, solvent composition, annealing time, and copolymer composition. The self-assembled aggregates were characterized with a combination of conventional transmission electron microscope and atomic force microscope techniques. It was found that vesicles were formed when making colloids from the PS43-b-PEO45-b-PS43 solutions of THF, dioxane, THF-water, and dioxane-water, while LCMs were obtained in the case of preparing aggregates from the copolymer solutions of DMF and DMF-water. In addition, the larger compound vesicles and a few aggregates with the complex structures were observed using neat dioxane and THF as initial solvents, respectively. Also, prolonging the annealing time was favorable to the formation of vesicles. Furthermore, some unclosed vesicles the bending of lamellae. (C) 2002 Elsevier Science Ltd. All rights reserved.
KeywordBlock Copolymers Crew-cut Chain Architectures Self-assembly Vesicles Morphology
Indexed BySCI
Language英语
WOS IDWOS:000181385300015
PublisherPERGAMON-ELSEVIER SCIENCE LTD
Citation statistics
Document Type期刊论文
Identifierhttp://ir.iccas.ac.cn/handle/121111/80072
Collection中国科学院化学研究所
Corresponding AuthorCheng, SY
Affiliation1.Hubei Univ, Coll Chem & Mat Sci, Wuhan 430062, Peoples R China
2.Chinese Acad Sci, Inst Chem, Beijing 100080, Peoples R China
3.Zhejiang Univ, Inst Polymer Sci, Hangzhou 310027, Peoples R China
Recommended Citation
GB/T 7714
Yuan, JJ,Li, YS,Li, XQ,et al. The "crew-cut" aggregates of polystyrene-b-poly(ethylene oxide)-b-polystyrene triblock copolymers in aqueous media[J]. EUROPEAN POLYMER JOURNAL,2003,39(4):767-776.
APA Yuan, JJ.,Li, YS.,Li, XQ.,Cheng, SY.,Jiang, L.,...&Fan, ZQ.(2003).The "crew-cut" aggregates of polystyrene-b-poly(ethylene oxide)-b-polystyrene triblock copolymers in aqueous media.EUROPEAN POLYMER JOURNAL,39(4),767-776.
MLA Yuan, JJ,et al."The "crew-cut" aggregates of polystyrene-b-poly(ethylene oxide)-b-polystyrene triblock copolymers in aqueous media".EUROPEAN POLYMER JOURNAL 39.4(2003):767-776.
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